An air-defense training exercise will be conducted over the Washington region early Tuesday, according to the North American Aerospace Command (NORAD).

The exercise is scheduled for 12:30 a.m. to 2:30 a.m. and may involve flights as low as 2,500 feet, NORAD said. Portions of the exercise may be visible from the ground, NORAD added in a statement issued Monday.

The exercise will involve F-16 fighters, an MH-65D Dolphin helicopter and two Civil Air Patrol Cessna 182T aircraft, NORAD said.

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